Rename 'TryToFindVsSdk2017' MSBuild target to 'MaybeFindVsSdk2017'. Add 'MaybeMissingVsSdk2017' MSBuild target. Call both of them from the 'InitialTargets' property so they can actually override the build processing, if necessary.
check-in: e1d9903754 user: mistachkin tags: vs2017